1.

In a series LCR circuit R = 200 W and the voltage and the frequency of the main supply is 220 V and 50 Hz respectively. On taking out the capacitance from the circuit the current lags behind the voltage by 30°. On taking out the inductor from the circuit the current leads the voltage by 30°. The power dissipated in the LCR circuit is(1) 305 W(2) 210 W(3) Zero W(4) 242 W

Answer»

4

The given circuit is under resonance as XL = XC 

Hence power dissipated in the circuit is

P = V2/R = 242 W



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